First of all, I know how to do motion blur shots. I just have a question about motion blur. I have this picture, and a few more and I am just wondering how come only half of it is blurred, but the other half is crisp? I just don't get how some parts come out blurred while some don't, I use a slower shutter, and I'm panning the camera, so in theory (my theory's never usually work) shouldn't all of the picture be blurred (except for the biker)? If someone could just explain to me how this happens, I would be very happy, as this has been bothering me for a while now. ps. I have no idea if this is the right spot for this thread or not, but if it isn't could a mod move it to the right spot? Thanks.